PSB21473FV13XT Infineon Technologies, PSB21473FV13XT Datasheet - Page 534

• Manufacturer Part Number: PSB21473FV13XT
• Manufacturer: Infineon Technologies

Specifications of PSB21473FV13XT

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (max): 3.6V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 144
• Lead Free Status / RoHS Status: Compliant

Data Sheet
22.5
The address generation of the USB memory buffer is based on the address offset and
base address pointer. This scheme allows flexible and application specific buffer
allocation and management. The length of an endpoint buffer can be up to 8, 16, 32 or
64 bytes. The start address of each endpoint buffer can be located to memory locations
according to table 22-2.
Table 22-2
Buffer Length
8 bytes
16 bytes
32 bytes
64 bytes
In order to avoid unused buffer space between two endpoint buffers, the largest buffer
should be located at the highest address. This structure should be used to allocate USB
memory for all endpoint buffers. The base address for the setup packet is always located
at address 00
Endpoints which are not used in a configuration do not consume buffer space as the
corresponding buffer length is 0.
The µC allocates the USB memory buffers for all endpoints by programming the endpoint
base address (EPBAn) and the block size (EPLEn) within the total USB buffers.
Memory Buffer Organisation
H
Buffer Length and Base Address Values
. This leads to a typical USB buffer structure as shown in figure 22-18.
Valid Buffer Base Addresses
40
80
C0
80
20
40
H
H
H
H
H
H
, 48
, 88
, 90
, 40
, 80
, C8
08
10
H
H
H
H
H
H
H
H
, 50
, 90
, A0
, 60
, C0
, 10
, 20
, D0
H
H
H
H
H
H
H
, 58
, 98
H
, 80
, 18
, 30
, B0
, D8
H
H
H
H
H
H
, 60
, A0
, A0
, 20
, 40
H
, C0
, E0
H
H
H
534
H
H
H
, 68
, 28
, 50
, A8
, C0
H
, D0
, E8
H
H
H
H
H
, 70
, 30
, 60
H
, B0
, E0
H
, E0
, F0
H
H
H
H
H
, 78
, 38
, 70
H
, B8
H
, F0
, F8
H
H
H
H
,
,
,
H
,
H
USB Module
PSB 21473
2003-03-31
INCA-D